SA627 Datasheet, PDF (2/16 Pages) NXP Semiconductors – High performance low power FM IF system with high-speed RSSI

Philips Semiconductors
High performance low power mixer FM IF system
with high-speed RSSI
Product specification
SA627
DESCRIPTION
The SA627 has faster RSSI rise and fall times. The SA627 is a high
performance monolithic low-power FM IF system incorporating a
mixer/oscillator, two limiting intermediate frequency amplifiers,
quadrature detector, muting, logarithmic received signal strength
indicator (RSSI) with fast rise and fall time, voltage regulator and
frequency check/limiter out (–). The SA627 also has an extra limiter
output. This signal is buffered from the output of the limiter and
provides a negative (–) limiter output. This can be used to provide a
frequency check function. The SA627 is available in 20-lead SOL
(surface-mounted miniature package) and 20-lead SSOP (shrink
small outline package).
FEATURES
• Fast RSSI rise and fall times
• Low power consumption: 5.8mA typical at 6V
• Mixer input to >500MHz
• Mixer conversion power gain of 13dB at 45MHz
• Mixer noise figure of 4.6dB at 45MHz
• XTAL oscillator effective to 150MHz (L.C. oscillator to 1GHz local
oscillator can be injected)
• 102dB of IF Amp/Limiter gain
• 25MHz limiter small signal bandwidth
• Temperature compensated logarithmic Received Signal Strength
Indicator (RSSI) with a dynamic range in excess of 90dB
• Audio output - mutable
• Low external component count; suitable for crystal/ceramic/LC
filters
• Excellent sensitivity: 0.22µV into 50Ω matching network for 12dB
SINAD (Signal to Noise and Distortion ratio) for 1kHz tone, 8kHz
deviation with RF at 45MHz and IF at 455kHz
• SA627 meets cellular radio specifications
• ESD hardened
PIN CONFIGURATION
D and DK Packages
RF_IN 1
RF BYPASS 2
XTAL OSC 3
XTAL OSC 4
MUTE_IN 5
V_CC 6
RSSI_OUT 7
MUTED AUDIO OUT 8
QUADRATURE IN 9
FREQ CHECK/ LIM OUT (–) ₁₀
20 MIXER OUT
19 _{IF AMP DECOUPLING}
18 IF AMP IN
17 IF AMP DECOUPLING
16 IF AMP OUT
15 GND
14 LIMITER IN
13 LIMITER DECOUPLING
12 _{LIMITER DECOUPLING}
11 LIMITER OUT (+)
Figure 1. Pin Configuration
SR00481
APPLICATIONS
• Digital cellular base stations
• High performance communications receivers
• Single conversion VHF/UHF receivers
• SCA receivers
• RF level meter
• Spectrum analyzer
• Instrumentation
• FSK and ASK data receivers
• Log amps
• Wideband low current amplification
• Digital cordless telephones
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Small Outline Large (SOL) package (Surface-mount)
20-Pin Plastic Shrink Small Outline Package (SSOP) (Surface-mount)
TEMPERATURE RANGE
-40 to +85°C
-40 to +85°C
ORDER CODE
SA627D
SA627DK
DWG #
SOT163-1
SOT266-1
1997 Nov 07
2
853-1649 18664